Hematology/Coagulation
This hereditary condition causes increased red cell fragility due to spectrin deficiency.
What is hereditary spherocytosis?
This is the first cardiac marker to rise following myocardial infarction.
What is myoglobin?
A positive DAT and positive antibody screen in a recently transfused patient suggests this complication.
What is delayed hemolytic transfusion reaction?
This rapid test distinguishes Staphylococcus aureus from other staphylococcal species.
What is the coagulase test?
This parasitic worm causes perianal itching and is diagnosed using the “Scotch tape test.”
What is Enterobius vermicularis?
Name the enzyme deficiency that leads to oxidative stress-induced hemolysis, particularly after fava bean ingestion.
What is G6PD deficiency?
In metabolic acidosis, the body compensates with this type of respiratory pattern.
What is hyperventilation?
For intrauterine transfusions, blood should be negative for these three antigens.
What are CMV, leukoreduced, and antigen-negative (e.g., Kell-negative)?
The CAMP test is used to identify this organism.
What is Streptococcus agalactiae (Group B Streptococcus)?
This protozoan causes meningoencephalitis after swimming in warm freshwater lakes.
What is Naegleria fowleri?
Deficiency of this coagulation factor leads to hemophilia B.
What is factor IX?
This pancreatic enzyme is more specific than amylase in diagnosing acute pancreatitis.
What is lipase?
This test is used to quantify fetal-maternal hemorrhage in Rh-negative mothers.
What is the Kleihauer-Betke test?
This encapsulated, urease-positive bacterium is a common cause of community-acquired pneumonia in alcoholics.
What is Klebsiella pneumoniae?
This protozoan causes sleeping sickness and shows motile trypomastigotes in blood.
What is Trypanosoma brucei?
This inclusion body in neutrophils is seen in May-Hegglin anomaly and other myelodysplastic syndromes.
What are Döhle bodies?
This form of calcium is physiologically active.
What is ionized calcium?
This blood product is indicated for a patient with thrombotic thrombocytopenic purpura (TTP).
What is plasma (usually plasma exchange using FFP)?
This oxidase-positive, comma-shaped bacterium grows in alkaline media and causes rice-water stools.
What is Vibrio cholerae?
Detection of microfilariae in peripheral blood requires collection at this time of day.
What is nighttime (for Wuchereria bancrofti)?
This leukemia subtype is associated with t(15;17) and treated with ATRA.
What is acute promyelocytic leukemia (APL)?
This protein, elevated in amniotic fluid and maternal serum, can indicate neural tube defects
What is alpha-fetoprotein (AFP)?
This advanced method removes autoantibodies to allow detection of underlying alloantibodies.
What is autoadsorption (or alloadsorption if recently transfused)?
This yeast shows germ tube positivity and is part of the normal flora.
What is Candida albicans?
This lung fluke is acquired from undercooked crustaceans and can mimic TB with hemoptysis.
What is Paragonimus westermani?